Question

THREE negative effects of planting the same type of crop over many years on the same plot of land.

Answer 1

it leads to the deficiency of that particular mineral needed by that crop and the other minerals increase.This makes the soil loose its fertility

Answer 2

The most important three negative effects of planting the same type of crop is that  

1. Depletion of nutrients

2. Overuse of fertilisers  

3. Pesticide resistant weeds tend to develop  

Explanation:  

Planting of the same crop is not advisable in the agriculture; usually the plants are alternated with leguminous plant to replenish the soil with its nitrogen content. The growth of same type of plants require same fertilisers that are to be sprayed without intervals thereby causing the land to become fertiliser resistant.